Seal



FIG. 1 is a front perspective view of a seal embodying our new design;

FIG. 2 is a front perspective view of a seal with a housing;

FIG. 3 is a front view thereof, the rear view being identical to the front view;

FIG. 4 is a left view thereof, the right view being identical to the front view;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a seal, as shown and described. 